From b05400154d99ae6362f785578ce07cc5f972f2d9 Mon Sep 17 00:00:00 2001
From: Georgy Bronnikov <georgy.bronnikov@jetbrains.com>
Date: Sun, 6 Dec 2020 15:58:51 +0300
Subject: [PATCH] IR: remove IrSymbolDeclaration

---
 .../kotlin/fir/backend/ConversionUtils.kt     | 25 +++++++------------
 .../KotlinNothingValueExceptionLowering.kt    |  3 +--
 .../lower/StringConcatenationLowering.kt      |  4 ---
 .../ir/declarations/IrAnonymousInitializer.kt |  3 ++-
 .../kotlin/ir/declarations/IrClass.kt         |  3 ++-
 .../kotlin/ir/declarations/IrConstructor.kt   |  3 ++-
 .../kotlin/ir/declarations/IrDeclaration.kt   |  4 ---
 .../kotlin/ir/declarations/IrEnumEntry.kt     |  3 ++-
 .../ir/declarations/IrFakeOverrideFunction.kt |  4 ++-
 .../ir/declarations/IrFakeOverrideProperty.kt |  4 ++-
 .../kotlin/ir/declarations/IrField.kt         |  2 +-
 .../kotlin/ir/declarations/IrScript.kt        |  4 ++-
 .../ir/declarations/IrSimpleFunction.kt       |  3 ++-
 .../kotlin/ir/declarations/IrTypeAlias.kt     |  2 +-
 .../kotlin/ir/declarations/IrTypeParameter.kt |  3 ++-
 .../ir/declarations/IrValueParameter.kt       |  3 ++-
 .../kotlin/ir/declarations/IrVariable.kt      |  3 ++-
 .../jetbrains/kotlin/ir/util/SymbolTable.kt   |  3 +--
 .../common/serialization/ExpectActualTable.kt |  1 -
 19 files changed, 38 insertions(+), 42 deletions(-)

diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
index d34e472b1b6..6e8e5916690 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt
@@ -35,13 +35,13 @@ import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.declarations.UNDEFINED_PARAMETER_INDEX
 import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.descriptors.WrappedReceiverParameterDescriptor
 import org.jetbrains.kotlin.ir.expressions.IrConst
 import org.jetbrains.kotlin.ir.expressions.IrConstKind
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrStatementOrigin
 import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.symbols.*
+import org.jetbrains.kotlin.ir.symbols.impl.IrValueParameterSymbolImpl
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.types.impl.IrErrorTypeImpl
 import org.jetbrains.kotlin.ir.util.SymbolTable
@@ -331,22 +331,15 @@ internal fun IrDeclarationParent.declareThisReceiverParameter(
     thisOrigin: IrDeclarationOrigin,
     startOffset: Int = this.startOffset,
     endOffset: Int = this.endOffset
-): IrValueParameter {
-    val receiverDescriptor = WrappedReceiverParameterDescriptor()
-    return symbolTable.declareValueParameter(
-        startOffset, endOffset, thisOrigin, receiverDescriptor, thisType
-    ) { symbol ->
-        symbolTable.irFactory.createValueParameter(
-            startOffset, endOffset, thisOrigin, symbol,
-            Name.special("<this>"), UNDEFINED_PARAMETER_INDEX, thisType,
-            varargElementType = null, isCrossinline = false, isNoinline = false,
-            isHidden = false, isAssignable = false
-        ).apply {
-            this.parent = this@declareThisReceiverParameter
-            receiverDescriptor.bind(this)
-        }
+): IrValueParameter =
+    symbolTable.irFactory.createValueParameter(
+        startOffset, endOffset, thisOrigin, IrValueParameterSymbolImpl(),
+        Name.special("<this>"), UNDEFINED_PARAMETER_INDEX, thisType,
+        varargElementType = null, isCrossinline = false, isNoinline = false,
+        isHidden = false, isAssignable = false
+    ).apply {
+        this.parent = this@declareThisReceiverParameter
     }
-}
 
 fun FirClass<*>.irOrigin(firProvider: FirProvider): IrDeclarationOrigin = when {
     firProvider.getFirClassifierContainerFileIfAny(symbol) != null -> IrDeclarationOrigin.DEFINED
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/KotlinNothingValueExceptionLowering.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/KotlinNothingValueExceptionLowering.kt
index f41342edce7..f904a5a1797 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/KotlinNothingValueExceptionLowering.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/KotlinNothingValueExceptionLowering.kt
@@ -9,7 +9,6 @@ import org.jetbrains.kotlin.backend.common.BodyLoweringPass
 import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.ir.builders.irCall
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
-import org.jetbrains.kotlin.ir.declarations.IrSymbolDeclaration
 import org.jetbrains.kotlin.ir.expressions.IrBody
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.expressions.IrExpression
@@ -23,7 +22,7 @@ class KotlinNothingValueExceptionLowering(
 ) : BodyLoweringPass {
     override fun lower(irBody: IrBody, container: IrDeclaration) {
         if (!skip(container)) {
-            irBody.transformChildrenVoid(Transformer((container as IrSymbolDeclaration<*>).symbol))
+            irBody.transformChildrenVoid(Transformer(container.symbol))
         }
     }
 
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/StringConcatenationLowering.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/StringConcatenationLowering.kt
index e164769b05d..a2cb3dcca7b 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/StringConcatenationLowering.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/StringConcatenationLowering.kt
@@ -121,10 +121,6 @@ private class StringConcatenationTransformer(val lower: StringConcatenationLower
     }
 
     override fun visitDeclaration(declaration: IrDeclarationBase): IrStatement {
-        if (declaration !is IrSymbolDeclaration<*>) {
-            return super.visitDeclaration(declaration)
-        }
-
         with(declaration) {
             buildersStack.add(
                 context.createIrBuilder(declaration.symbol, startOffset, endOffset)
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrAnonymousInitializer.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrAnonymousInitializer.kt
index cffadea14d9..7c8f0f0ca38 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrAnonymousInitializer.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrAnonymousInitializer.kt
@@ -23,9 +23,10 @@ import org.jetbrains.kotlin.ir.symbols.IrAnonymousInitializerSymbol
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
-abstract class IrAnonymousInitializer : IrDeclarationBase(), IrSymbolDeclaration<IrAnonymousInitializerSymbol> {
+abstract class IrAnonymousInitializer : IrDeclarationBase() {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: ClassDescriptor // TODO special descriptor for anonymous initializer blocks
+    abstract override val symbol: IrAnonymousInitializerSymbol
 
     abstract val isStatic: Boolean
 
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrClass.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrClass.kt
index 356e8674162..59b68ebdf0f 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrClass.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrClass.kt
@@ -29,11 +29,12 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
 abstract class IrClass :
-    IrDeclarationBase(), IrSymbolDeclaration<IrClassSymbol>, IrDeclarationWithName, IrDeclarationWithVisibility,
+    IrDeclarationBase(), IrDeclarationWithName, IrDeclarationWithVisibility,
     IrDeclarationContainer, IrTypeParametersContainer, IrAttributeContainer, IrMetadataSourceOwner {
 
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: ClassDescriptor
+    abstract override val symbol: IrClassSymbol
 
     abstract val kind: ClassKind
     abstract var modality: Modality
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrConstructor.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrConstructor.kt
index 0d07f928444..756f8a0c9c0 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrConstructor.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrConstructor.kt
@@ -21,9 +21,10 @@ import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
-abstract class IrConstructor : IrFunction(), IrSymbolDeclaration<IrConstructorSymbol> {
+abstract class IrConstructor : IrFunction() {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: ClassConstructorDescriptor
+    abstract override val symbol: IrConstructorSymbol
 
     abstract val isPrimary: Boolean
 
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclaration.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclaration.kt
index f9710aa93e6..2d296e31522 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclaration.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclaration.kt
@@ -48,10 +48,6 @@ interface IrDeclaration : IrStatement, IrSymbolOwner, IrMutableAnnotationContain
 
 abstract class IrDeclarationBase : IrElementBase(), IrDeclaration
 
-interface IrSymbolDeclaration<out S : IrSymbol> : IrDeclaration {
-    override val symbol: S
-}
-
 interface IrOverridableDeclaration<S : IrSymbol> : IrDeclaration {
     var overriddenSymbols: List<S>
 }
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrEnumEntry.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrEnumEntry.kt
index 761bf1251a5..4c9276b4c0f 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrEnumEntry.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrEnumEntry.kt
@@ -23,9 +23,10 @@ import org.jetbrains.kotlin.ir.symbols.IrEnumEntrySymbol
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
-abstract class IrEnumEntry : IrDeclarationBase(), IrSymbolDeclaration<IrEnumEntrySymbol>, IrDeclarationWithName {
+abstract class IrEnumEntry : IrDeclarationBase(), IrDeclarationWithName {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: ClassDescriptor
+    abstract override val symbol: IrEnumEntrySymbol
 
     abstract var correspondingClass: IrClass?
     abstract var initializerExpression: IrExpressionBody?
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideFunction.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideFunction.kt
index 6d39f830ec9..bda12785227 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideFunction.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideFunction.kt
@@ -8,7 +8,9 @@ package org.jetbrains.kotlin.ir.declarations
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
 
-interface IrFakeOverrideFunction : IrSymbolDeclaration<IrSimpleFunctionSymbol> {
+interface IrFakeOverrideFunction : IrDeclaration {
+    override val symbol: IrSimpleFunctionSymbol
+
     var modality: Modality
 
     fun acquireSymbol(symbol: IrSimpleFunctionSymbol): IrSimpleFunction
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideProperty.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideProperty.kt
index ccd9a9bea65..f8f6c435c0c 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideProperty.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFakeOverrideProperty.kt
@@ -8,7 +8,9 @@ package org.jetbrains.kotlin.ir.declarations
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 
-interface IrFakeOverrideProperty : IrSymbolDeclaration<IrPropertySymbol> {
+interface IrFakeOverrideProperty : IrDeclaration {
+    override val symbol: IrPropertySymbol
+
     var modality: Modality
     var getter: IrSimpleFunction?
     var setter: IrSimpleFunction?
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrField.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrField.kt
index 8b39978db30..43d7d2cf599 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrField.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrField.kt
@@ -16,11 +16,11 @@ import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
 abstract class IrField :
     IrDeclarationBase(),
-    IrSymbolDeclaration<IrFieldSymbol>,
     IrDeclarationWithName, IrDeclarationWithVisibility, IrDeclarationParent, IrMetadataSourceOwner {
 
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: PropertyDescriptor
+    abstract override val symbol: IrFieldSymbol
 
     abstract var type: IrType
     abstract val isFinal: Boolean
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrScript.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrScript.kt
index 8f242cc2d3b..2ab4f201e8a 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrScript.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrScript.kt
@@ -13,9 +13,11 @@ import org.jetbrains.kotlin.ir.types.IrType
 //TODO: make IrScript as IrPackageFragment, because script is used as a file, not as a class
 //NOTE: declarations and statements stored separately
 abstract class IrScript :
-    IrDeclarationBase(), IrSymbolDeclaration<IrScriptSymbol>, IrDeclarationWithName,
+    IrDeclarationBase(), IrDeclarationWithName,
     IrDeclarationParent, IrStatementContainer {
 
+    abstract override val symbol: IrScriptSymbol
+
     // NOTE: is the result of the FE conversion, because there script interpreted as a class and has receiver
     // TODO: consider removing from here and handle appropriately in the lowering
     abstract var thisReceiver: IrValueParameter
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt
index 6a41b6e6eec..78caf32b5fc 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt
@@ -11,11 +11,12 @@ import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
 abstract class IrSimpleFunction :
     IrFunction(),
-    IrSymbolDeclaration<IrSimpleFunctionSymbol>,
     IrOverridableDeclaration<IrSimpleFunctionSymbol>,
     IrOverridableMember,
     IrAttributeContainer {
 
+    abstract override val symbol: IrSimpleFunctionSymbol
+
     abstract val isTailrec: Boolean
     abstract val isSuspend: Boolean
     abstract val isFakeOverride: Boolean
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeAlias.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeAlias.kt
index f2fee1943e2..c8a2eb933ef 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeAlias.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeAlias.kt
@@ -15,13 +15,13 @@ import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
 abstract class IrTypeAlias :
     IrDeclarationBase(),
-    IrSymbolDeclaration<IrTypeAliasSymbol>,
     IrDeclarationWithName,
     IrDeclarationWithVisibility,
     IrTypeParametersContainer {
 
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: TypeAliasDescriptor
+    abstract override val symbol: IrTypeAliasSymbol
 
     abstract val isActual: Boolean
     abstract var expandedType: IrType
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeParameter.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeParameter.kt
index e6efde84b05..3b9c8b55600 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeParameter.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrTypeParameter.kt
@@ -24,9 +24,10 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.types.Variance
 
-abstract class IrTypeParameter : IrDeclarationBase(), IrSymbolDeclaration<IrTypeParameterSymbol>, IrDeclarationWithName {
+abstract class IrTypeParameter : IrDeclarationBase(), IrDeclarationWithName {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: TypeParameterDescriptor
+    abstract override val symbol: IrTypeParameterSymbol
 
     abstract val variance: Variance
     abstract val index: Int
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrValueParameter.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrValueParameter.kt
index dd3db5a6a42..88da0d7d526 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrValueParameter.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrValueParameter.kt
@@ -24,9 +24,10 @@ import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 
-abstract class IrValueParameter : IrValueDeclaration(), IrSymbolDeclaration<IrValueParameterSymbol> {
+abstract class IrValueParameter : IrValueDeclaration() {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: ParameterDescriptor
+    abstract override val symbol: IrValueParameterSymbol
 
     abstract val index: Int
     abstract var varargElementType: IrType?
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrVariable.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrVariable.kt
index 62bf477a1cb..8aff48e4522 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrVariable.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrVariable.kt
@@ -21,9 +21,10 @@ import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.symbols.IrVariableSymbol
 
-abstract class IrVariable : IrValueDeclaration(), IrSymbolDeclaration<IrVariableSymbol> {
+abstract class IrVariable : IrValueDeclaration() {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: VariableDescriptor
+    abstract override val symbol: IrVariableSymbol
 
     abstract val isVar: Boolean
     abstract val isConst: Boolean
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt
index 7d60ccda155..988b01e0e34 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt
@@ -195,9 +195,8 @@ class SymbolTable(
                 }
             } else {
                 if (d.isBound()) {
-                    val result = (d.owner as? IrSymbolDeclaration<*>)?.symbol ?: descriptorToSymbol[d]
                     @Suppress("UNCHECKED_CAST")
-                    result as S?
+                    d.owner.symbol as S
                 } else {
                     descriptorToSymbol[d]
                 }
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/ExpectActualTable.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/ExpectActualTable.kt
index 7b9fd41d089..ace9bbdd34c 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/ExpectActualTable.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/ExpectActualTable.kt
@@ -90,7 +90,6 @@ class ExpectActualTable(val expectDescriptorToSymbol: MutableMap<DeclarationDesc
 
     fun findExpectsForActuals(declaration: IrDeclaration) {
         if (declaration.descriptor !is MemberDescriptor) return
-        if (declaration !is IrSymbolDeclaration<*>) return
 
         val descriptor = declaration.symbol.descriptor